  Pole, albedo and shape of the minor planets 624 Hektor and 43 Ariadne: Two tests for comparing four different pole determination methodsDetal, Alain  ; ; et alin Astronomy and Astrophysics (1994), 281 Asteroids 624 Hektor and 43 Ariadne have been observed photometrically at the European Southern Observatory (La Silla, Chile) in order to determine their pole orientation. The lightcurves (1984 and 1991 ... [more ▼] Asteroids 624 Hektor and 43 Ariadne have been observed photometrically at the European Southern Observatory (La Silla, Chile) in order to determine their pole orientation. The lightcurves (1984 and 1991 oppositions for Hektor, and 1985 for Ariadne) are presented. Some of the traditional pole determination methods have been improved, and completely original ones have been developed. They are described and applied to the newly recorded and previously published light curves. The results are commented and compared with previous ones. In addition to the pole orientation, we also derive some information on the shape or the albedo distribtuion of the objects. With the aim of optimizing future observations of these asteroids, we present some graphs showing the best longitudes where they should be measured. Finally, we suggest some improvements in the pole determination and modeling methods based upon photometric data. [less ▲] Detailed reference viewed: 23 (4 ULg)Photometry, pole orientation and shape parameters of the minor planets 624 Hektor and 43 AriadneDetal, Alain ; ; et alin Brahic, A.; Gérard, J. C.; Surdej, J. (Eds.) "Observations and physical properties of small solar system bodies", 30th Liège International Astrophysical Colloquium, Institut d’Astrophysique, Liège (1992) Detailed reference viewed: 20 (3 ULg)Photoelectric photometry of 22 Kalliope during the 1985 opposition and determination of its pole orientation - The 'magnitude-aspect' relations revisitedSurdej, Jean ; Pospieszalska-Surdej, Anna ; et alin Astronomy and Astrophysics (1986), 170 Abstract image available at: http://esoads.eso.org/abs/1986A&A...170..167S Detailed reference viewed: 9 (4 ULg)Asteroid rotation - Hunting for a record: 1689 Floris-Jan; Surdej, Jean in The Messenger (1982), 29 Last year, in June 1981 - ESO Messenger No. 24, p. 22-23 - H. J. Schober published areport on "Spinning Asteroids and Photometry". There he mainly gave a general introduction about what can be done using ... [more ▼] Last year, in June 1981 - ESO Messenger No. 24, p. 22-23 - H. J. Schober published areport on "Spinning Asteroids and Photometry". There he mainly gave a general introduction about what can be done using UBV photometry in order to derive physical properties of asteroids such as geometrie forms, diameters, reflectance on the surface, bimodality of asteroids with respect to typology. A special effort was made to report about the activities to deal with asteroids as "variable objects" like variable stars - showing Iightcurves with defined rotation rates to be derived. Among asteroids it was stated that the longest rotation periods found before 1975 were not larger than 20 hours - followed by 654 Zelinda 31 ~9 (1975). 393 Lampetia 38h7, 128 Nemesis 39h0 (1979), 709 Fringilla 52h4 (1979) and 182 Eisa 80~00 (1980), the latter corresponding to 3d33. [less ▲] Detailed reference viewed: 26 (1 ULg)The six-day rotation period of 1689 Floris-Jan - A new record among slowly rotating asteroids; Surdej, Jean ; et alin Astronomy and Astrophysics (1982), 115 Abstract image available at: http://esoads.eso.org/abs/1982A&A...115..257S Detailed reference viewed: 10 (1 ULg)Rotation period and photoelectric lightcurves of asteroids 68 Leto and 563 SuleikaSurdej, Jean ; in Astronomy and Astrophysics. Supplement Series (1980), 41 Abstract image available at: http://esoads.eso.org/abs/1980A&AS...41..335S Detailed reference viewed: 13 (0 ULg)UBV photometry of the asteroids 9 Metis, 87 Sylvia and 247 Eukrate during their oppositions in 1978 with respect to lightcurves; Surdej, Jean in Astronomy and Astrophysics. Supplement Series (1979), 38 Abstract image available at: http://esoads.eso.org/abs/1979A&AS...38..269S Detailed reference viewed: 33 (1 ULg) |
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